Box-magazine construction for repeating firearms



March 27, 1945 c. G. swEBlLlUS v 2,372,614

BOX-MAGAZINE CONSTRUCTION FOR REPEATING FREARMS y Filed March' 5, 1943 2Sheets-Sheet 1 v y grill/lll lo" r;

N /I//lllllll March 27, 1945. c. G. swEBlLlus 2,372,614

BOX-MAGAZINE CONSTRUCTION FOR REPEATING FIREARMS Filed March 5, 1943 24Sheets-Sheet 2 www I Patented Mar. 27, 1945 UNITED- seTATEs PATENTOFFICE BOX-MAGAZIN E CONSTRUCTION FOR vREI'EATIN G FIREARMS Carl G.swebilius, Hamden, Conn. Application March 5, 1943, Serial No. 478,059-

8! Claims.

The present invention relates to improvemnts in repeating firearmsy andkrelates more particularly to the portions thereof: including andassociated with the box-magazines.

One of the objects of the present invention is to provide a'repeatingfirearm with a superior box-magazine constructionV whereby abox-magazine may be releasably coupled to the firearmstructure in asimple, 'reliable' and effective manner.

Another object of thei present invention isy to provide a structurek ofthe: character referred to, whereby a box-magazine may be. adequatelycoupled to the firearm-structure at one end of the box-magazine Withoutrequiring. additional'. support at the opposite end of the saidbox-magazine.

A further object of the present invention is to provide a repeatingrearrrr With a superiorv boxmagazine construction whereby thebolt-stop-actuator of the magazine-follower may be adequately protectedagainst accidental injury.

With the above and other objects: in View, as will appear to thoseskilled in the art from the present disclosure, this inventionincludes'all features in the said disclosure Whichare novel over`v l theprior art andwhich are not claimed in any taken on the line 2--2 of Fig.1, but on a larger scale;

Fig. 3 is a similar view taken on the line 3-'-3 og Fig. l;

Fig. 4 is a View of the box-magazine detached,

shown partly in side eleva-tion and partly in section;

Fig. 5 is a View in rear elevation ofithe boxmagazine;

Fig. 6 is a tcp or plan view thereof;

Fig. 7 is a broken view inside elevation of' the forward portion of the.frame or trigger-plate;

Fig. 8 is aview thereof in front elevation;`

Fig. 9 is a broken underside-1 viewl ofthe forward portion of the frameor trigger-plate; and

Fig. l0 is a perspectivel View of the magazinelatch, detached.

The particular repeating firearm herein chosen for purposes ofillustrating one embodiment of the present invention is of thegas-operatedselfloading type of the general character shown in mycri-pending application" Serial No. 4783058, led March 5, 1943.Thesaidfirearm includes, inthe main, a frame or trigger-platel I5, acylindrically-contoured receiver' I6; a. barrel! l1', a stock I8' and abarrel-cover I9. The firearm-structure also includes a breech-bolt 201and a boxmagazine generally designated by the reference character 2i.

The frame or trigger-plate |5- above referred to is mainly ofplate-lil're formand is formed on its lower edge with an integralloop-like triggerguard 22 extending around a trigger 23 which lattercontrols the ring mechanism of the firearm in any suitable manner notrequiring. detailed description herein. The said frame It',Y is rigidlysecured tol the stock I8 in any suitable manner such, for instance, asby a bolt or stud 24 -while the said frame l5` and receiver I6 aredetachably secured together in any suitable manner. In eect, the-frameor trigger-plate l5 and the receiver I`6 whenv united together,constitute what may be termed a frame-structure.

The barrel Il above referred to is rigidly coupled atV its rear endwithl the forwardl end of the receiver I6 in a manner common in firearmsand extends through a suitable passage or cavity in the forward portionof the stock I8 and through aA channel formed in the underside of thebarrelcover I9.

The receiver H5V is generally of cylindrical form exteriorly and isprovided in its interior with an axially extending passage q25in whichthe breechbolt 2U' operates. Immediately forwardly of the forward edgeof the frame or trigger-plate l5, the receiver I6 is formed in itsunderside With a verticalmagazine-receiving passage 26 into which ..35Fig. 2 is a broken horizontal sectional vievsr` normally projects theupper portion of the boxmagazine 2l before referred to.

The box-magazine 2l includes complemental corresponding side-walls21-21, a front end-wall 28; a rear end-wall 29 and a bottom wall 30. Asis shown particularly well in Fig. 2, the sidewalls 21-2 T are formedintegral with the respective opposite side edges of the front end-wall28 so that all of the said walls 2'1-21' and 28v may be convenientlyproduced by folding up sheet meta-l into substantially U-shaped form incross section. Therear end of. each of the side-walls 2? 21 is bentinwardly toward the complemental side-Wall to provide one ofv twovertical couplingflangesv 3`|3 i. Each of the said coupling-flanges3'l-3l is normally entered into the adjacent one of two verticalcoupling-grooves 32-32. The said coupling-grooves 32-32 are respectivelyformed in the opposite side faces of the forward `portion ofthe frame ortrigger-plate, l5 and respectively accommodate the coupling-Hanges3'l-3l with a free sliding fit.

The rear end-wall 29 of' the box-magazine has its vertical center bentup to provide a hollow rib 33, the interior of which latter opensforwardly into the hollow interior of the box-magazine structure inwhich is accommodated. a plurality of cartridges 34. The respective,opposite side edges ofthe plate-like rear end-wall 29 are bentrearwardly and slightly-inclined inwardly to respectively provide anges35-35 having their respective outer faces snugly fitting against andpreferably brazed to the adjacent inner faces of the rear portion of theside-walls 21-21 of the box-magazine. The vertical rear edgesl of theflanges 35-35 of the rear end-wall 29 abut and assist in supporting theinturned couplingflanges 3I-3I formed at the rear of the sidewalls21-21, as is shown in Fig. 2. The hollow rib 33 of the rear end-wall 29is accommodated in a vertical forwardly-opening groove 36 formed in theforward edge of the frame or trigger-plate I5.

To the rear of its vertical groove 36, the forward portion of the frameor trigger-plate I is formed with a vertical guideway 31 in whichvertically reciprocates the depending stem 38 of avertically-reciprocating bolt-stop generally designated by the referencecharacter 39.

The bolt-stop 39 above referred to includes a head 40 having adownwardly-facing surface 4| for purposes as will hereinafter appear.

stood in the art to stop the breech-bolt in its rearmost position whenthe box-magazine 2| is empty, and does not require further discussionsave as will hereinafter appear.

The respective upper edges of the side-walls 2'I-2'I of the box-magazineZI are bent inwardly toward each otherto respectively provideretaining-lips 42--42 which serve to limit the direct upward travel ofthe cartridges 34. Located below the cartridges 34 within the space inthe boxmagazine 2| defined by its four walls 21-21, 28 and 29, is acartridge-follower 43r (Fig. 4) of inverted U-shaped form in sideelevation and pressed upwardly by a magazine-spring 44 resting at itslower end upon the bottom wall 30.

The cartridge-follower 43 is provided with a lifting-finger 45projecting rearwardly from the said cartridge-follower into the hollowinterior of the vertical rib 33 located centrallyof the rear end-wall 29of the box-magazine 2|. As the cartridge-follower 43 moves upwardlyfollowing the sequential removal of cartridges from the upper end of thebox-magazine, the said follower will ultimately reach its uppermostposition when all cartridges have been removed from the boxmagazine andduring the last portion of its movement, the lifting-finger 45 of thecartridge-follower v43 will engage with the downwardly-facing surface 4Iof the bolt-stop 39 to thereby lift the said bolt-stop.- `The lifting ofthe bolt-stopy 39 as v just described will cause the same to interposeitself in the path of forward travel of the breechbolt 20, in a mannerusual in repeating firearms.

Each of the coupling-anges 3 |-3I at the rear end of the box-magazine 2|is formed with one of two rearwardly opening latching notches 46-46respectively receiving the adjacent one of two latchinglanges 41-41forming a feature of a magazine-latch 48. The said magazine-latch 48 ispreferably formed of sheet metal and is of U-shaped form in crosssection, as is shown especially well in Fig. 10. The latching-flanges41--41 of the magazine-latch 48 are bent outwardly along aforwardly-and-downwardly-inclined path from the respective upperside-walls of the sai-d magazine-latch and the entry of the saidlatching-ianges 41-4'! into the latchingnotches 46-46 of thebox-magazine 2| serves to releasably retain the latter in connectedrelationship with the firearm-structure. The said magazine-latch 48 ismounted for swinging movement The said bolt-stop 39 functions in amanner well underupon a pivot-pin 49 extending transversely through thesaid magazine-latch and through the adjacent portion of the frame ortrigger-plate I5 embraced by the said magazine-latch.

Interposed between the lower portion of the rear wall of themagazine-latch 48 and the adjacent portion of the frame I5, is a helicallatchspring 5I). The latch-spring 50 just referred to serves toyieldingly urge the magazine-latch 48 to turn in a clockwise directionaround the pivot. pin 49 so as to normally project the forward ends ofthe4 latching-flanges 41-41 into the' latchingnotches 4'6-46 in thebox-magazine 2| The clockwise turning movement of the saidmagazine-latch 48 is limited by providing the latter at the upper edgeof its rear wall with an upwardlyand-rearwardly-curved stop-iinger 5Iengageable with the underside of the adjacent portion of the frame I5.

By providing the box-magazine 2| with coupling-anges 3I-3AI or theirequivalent, the said box-magazine may be rigidly though releasablycoupled to the rearm-structure by the entry of the saidcoupling-flanges' 3|-3I into couplinggrooves 32-32 or their equivalent.

By providing the box-magazine 2| or its equivalent with a hollow ribsuch as 33, not only is the said box-magazine stiiened and reinforced,but two vadditional advanta-ges are achieved inasmuch as the said rib 33acts as a guard for the liftingfinger 45 and at the same time assists instabilizing the box-magazine by its entry into the clearance-groove 36in the forward portion of the frame I5.

'The invention may be carried out in other speciilc ways than thoseherein set forth without departing from the spirit and essentialcharacteristics of the' invention, Iand the present embodiments are,therefore, to be considered in all respects as illustrative and notrestrictive, and all changes coming Within the meaning and equivalencyrange of the appended claims are intend-Y ed to be embraced therein.

I claim:

1. A box-magazine for repeating firearms comprising: a vertical frontend-Wall; a vertical rear end-wall; and two vertical complementalsidewalls; one of the said end-walls constituting a unit:physically-distinct from and non-integral with the said side-walls andembraced between the same, and both of the said end-walls being spacedfrom each other and the said side-walls being spaced from each other toprovide a chamber for the accommodation of cartridges; each of the saidcomplemental side-walls of the boxmagazine having a portion extendingoutwardly beyond the non-integral one of the said end-walls and theoutwardly-extending portion of each of the said side-walls beingprovided with a vertically-extending coupling-portion projectinginwardly toward the coupling-portion of the complemental side-wall at alocation spaced outwardly with respect to the said non-integralend-wall.

2. A box-magazine for repeating rearms comprising: a vertical frontend-wall; a vertical rear end-wall; and two vertical complementa]sidewalls; one of the said end-walls constituting a unitphysically-distinct from and non-integral with thel said side-walls andembraced between the same, and both of the said end-walls being spacedfrom each other and the said side-walls being spaced from each other toprovide a chamber for the accommodation of cartridges; each of the saidcomplemental side-walls of the box-maffazine having a portion extendingoutwardly beyond the non-integral one of the said end-walls and theoutwardly-extending portion of each of the vsaid side-walls beingprovided with an integral vertically-extending coupling-flange bentinwardly toward the coupling-flange of the complemental side-wall at alocation spaced outwardly with respect to the said non-integralend-wall.

3. A box-magazine for repeating Tlrearms comprising: a vertical frontend-wall; a vertical rear end-wall; and two vertical complementalsidewalls; one of the said end-walls constitutinga unitphysically-distinct from and non-integral with the said side-walls andembraced between the same, and both of the said end-walls being spacedfrom each other and the said side-walls being spaced from each other toprovide a chamber for the accommodation of cartridges; each of the saidcomplemental side-walls of the box-magazine having a portion extendingoutwardly beyond the non-integral one of the said end-walls and theoutwardly-extending portion of each of the said side-walls beingprovided with a vertically-extending coupling-portion projecting towardthe coupling-portion of the complemental sidewall at a location spacedoutwardly with respect to the said non-integral end-wall; the saidnonintegral end-wall of the box-magazine being provided with twooutwardly-projecting reinforcingportions each extending outwardlytherefrom toward one Vof the said coupling-portions and respectivelyadjacent to and in reinforcing relationship with the outwardly-extendingportion of one of the said side-walls.

4. A box-magazine for repeating rearms comprising: a vertical frontend-wall; a vertical rear end-wall; and two vertical complementalsidewalls; one of the said end-walls constituting a unitphysically-distinct from and non-integral with the said side-walls andembraced between the same, and both of the said end-walls being spacedfrom each other and the said side-walls being spaced from each other toprovide a chamber for the accommodation of cartridges; each of the saidcomplemental side-walls of the box-magazine having a portion extendingoutwardly be- Iyond the non-integral one of the said end-walls and theoutwardly-extending portion of each of the said side-walls beingprovided with an integral vertically-extending coupling-ange bentinwardly toward the coupling-ange of the complemental side-wall at alocation spaced outwardly with respect to the said non-integralend-wall; the said non-integral end-wall being provided on each of itsrespective opposite sides with one of two integral reinforcing-angesextending toward the said vertical couplingflanges and respective- 1y inreinforcing relationship with the outwardlyextending portion of one ofthe said side-walls.

5. A box-magazine for repeating Lfirearms comprising: a vertical frontend-wall; a Vertical rear end-wall; and two vertical complementalsidewalls; the said end-walls being spaced from each other and the saidside-walls-being spaced from each other to provide a chamber for theaccommodation of cartridges; one of the said end-walls being providedwith a vertical outwardly-extending hollow rib for the accommodation ofa movable interior member of the box-magazine; each of the saidcomplemental side-walls of the boxmagazine having a portion extendingoutwardly beyond the end-wall provided with the said hollow rib and eachof the outwardly-extending portions of the said side-walls beingprovided with a vertically-extending coupling-portion located outwardlywith respect to the said hollow rib and projecting toward thecoupling-portion of the complemental side wall.

6. A box-magazine for repeating firearms comprising: a vertical frontend-wall; a vertical rear end-wall; and two vertical complementalsidewalls; the said end-walls being spaced from each othere and the saidside-walls being spaced from each other to provide a chamber for theaccommodation of cartridges; one of the said end-walls being providedwith a vertical outwardly-extending hollow rib for the accommodation ofa movable interior member of the box-magazine; each of the saidcomplemental side-walls of the boxmagazine having a portion extendingoutwardly beyond the end-wall provided with the said hollow rib and theoutwardly-extending portion of each of the said side-walls beingprovided with an integral vertically-extending coupling-flange benttoward the coupling-flange of the complemental side-wall and locatedoutwardly with respect to the said hollow rib.

7. A box-magazine for repeating firearms comprising: a vertical frondend-wall; a vertical rear end-wall; and two vertical complementalside-walls; the said end-walls being spaced from each other and the saidside-walls being spaced from each other to provide a chamber for theaccommodation of cartridges; one .of the said end-walls being providedwith a vertical outwardly-extending hollow rib for the accommodation ofa movable interior member of the box-magazine; each of the saidcomplemental side-walls of the box-magazine having a portion extendingouty l wardly beyond the end-wall provided with the said hollow rib andthe outwardly-extending portion of each of the` said side-walls beingprovided with a vertically-extending coupling-portion located outwardlywith respect to the said hollow rib and projecting toward thecoupling-portion of the complemental side-wall; the end-wall of thebox-magazine having'the said hollow rib being provided on the respectiveopposite sides of the said rib with two outwardly-projectingreinforcing-portions each extending outwardly therefrom toward one ofthe said coupling-portions and respectvely adjacent to and inreinforcing relationship with the outwardly-extending portion of one ofthe said side-walls.

8. A box-magazine for repeating rearms comprising: a vertical frontend-wall; a vertical rear end-Wall; and two vertical complementalsidewalls; the said end-wallsl being spaced from each other and the-saidside-walls being spaced from each other to provide a chamber for theaccommodation of cartridges; one of the said end-walls being providedwith a vertical outwardly-extending hollow rib for the accommodation ofa movable interior member of the box-magazine; each Aoi the saidcomplemental side-walls of the boxma-gazine having a portion extendingoutwardly beyond the end-wall provided with the said hollow rib and theoutwardly-extending portion of each of the said side-walls beingprovided with an integral vertically-extending coupling-ange bent towardthe coupling-ange of the complemental side-wall and located outwardlywith respect to the said hollow rib; the end-wall having the said hollowrib being provided on each of its respective sides with one ofv twointegral reinforcing-anges extending toward the said verticalcoupling-flanges and respectively in reinforcing relationship with theoutwardly-extending portion of one of the said side-walls.

CARL G. ISWJEBILIUS.

